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Mazda 2 Key Fob Replacement It can be a bit frustrating when a fob stops working. However, this is a fairly common issue and can be fixed easily. It is usually a matter of replacing the batteries. You can find replacement batteries at a variety of hardware stores and big-box retailers. You can also find directions in the owner's manual, or on YouTube on how to replace the battery by opening the fob. What is a keyless system? The keyless entry system in your car is a remote control system that lets you to lock and unlock your car without the need to physically insert keys. It's usually on a key fob or built into your ignition key handle. Some models offer the option to remotely secure the tailgate and trunk. The system transmits radio signals to the computer in your car. The car then interprets the radio signal to determine if the key is the correct key. If it's the correct key the doors will open automatically and the engine can begin. The key fob also has the transponder or security chip to prevent the vehicle from starting if the wrong key is used. Keyless entry systems have their advantages and drawbacks. They may be activated accidentally by children playing with them, or turned on when the owner isn't in the car. This could cause power windows and other functions of the vehicle to operate without the owner’s knowledge or consent or consent, and may cause the alarm to go off. Another reason to be concerned is that there are a myriad of ways for thieves to breach the security of keyless entry systems, and then hack the computer of your vehicle to make it believe that your key fob is near enough to start the car. It is essential to have a spare key or fob. How do I replace my keyless entry system? It could be a huge problem if your key fob's battery fails while you are on the road. It's easy to replace the battery on the Mazda 2 flip key transponder. You'll only need to know how to open the key fob and what type of battery to buy. Use a screwdriver with tape wrap to gently pry the case open by working from one side to the other. Be careful not to break it. After the case is opened, take out the old battery. Place the case in a place so that it is not forgotten. Replace the battery, but be sure to align it so that the positive side is facing upwards. You can also program the replacement fob by writing down the code from the back of the manual key. It is important to note that although you can duplicate an old car key made of metal at hardware stores, a lot of the latest smart keys require programming by a locksmith or dealer. The cost of a new fob, programming, and mechanical backup keys can add up. Make sure to check your warranty, auto club membership, or insurance policy to determine if they will pay for the cost. G28 may be able save money by purchasing a key fob from an aftermarket store online, and then having it programmed by locksmith. How do I program my keyless entry system? In general, the same steps are used to program key fobs for all major car brands. The procedure for certain models may differ slightly and require special hardware or computer software. In these cases you should consult the manual or call a dealer for more assistance. Before starting, be sure to have all the necessary materials and tools. It is recommended to read the instructions for the keyless system to better understand how it functions. The installation is relatively easy however, you'll need to remove the steering wheel cover to gain access to the wires necessary for the connection. Wrapping the wires in electrical tape will protect them and insulate them. To program a key fob in a new vehicle, insert the original ignition key and turn it on the “ON” setting (not the “start” or “run”) When the key in your ignition is switched on, simultaneously press and keep holding both the unlock and the lock button on your new remote for 30 seconds. If you've done it correctly your vehicle will sound. The process of programming is also successful. After programming a new keyfob successfully turn the ignition to “OFF” and test each button to confirm that they function. How do I replace the battery in my keyless entry system? Every few years or when your key fob appears to become less responsive, you'll need to replace the batteries on your key fob. This can be done in less than 10 minutes. You don't need to reprogramme the key fob each time you change the battery. In the beginning, you'll want ensure that you have the proper type of battery in your inventory. The type of battery should be clearly written on the key fob in case you flip it over. If the type of battery is not clear it is possible to open the key fob with an flat-head screwdriver and look inside. Key fobs usually use CR-1620 battery, which is easily available at a variety of stores, including Home Depot Walmart & AutoZone. After you've removed the mechanical key from the key fob you can open it by making use of a screwdriver with a flathead or your fingernail. Replace the old battery with the one you purchased. The positive (+) side of the new battery must be facing up. Reassemble the two sides and then snap it to shut. Some key fobs need programming. This can only be done with a special tool that is only available to dealers or automotive locksmiths. Keys that do not have transponders do not require programming, therefore they are a good choice for those who do not have the equipment to program their car.